"DisplayPort v1.2 is now all official and it comes with an impressive tally of numbers to get your attention. Doubling the data throughput of v1.1a (from 10.8Gbps to 21.6Gbps), the latest version will be able to support multiple monitors via only a single output cable, allowing you to daisy-chain up to four 1920x1200 monitors, for example. It can also perform bi-directional data transfer, which will permit USB hubs, webcams, and touchscreen panels integrated into displays to communicate over the same cable as the video signal. Backwards compatibility with older peripherals is assured, but you'll naturally need a v1.2-capable computer to exploit all this newfound goodness."